• The highlight of Northern Irish international O'Neill's playing career was winning the 1977/78 English title and 1979 and 1980 European Cups under Brian Clough at Nottingham Forest (though he did not play in the first of those finals). He also appeared at the 1982 FIFA World Cup.

• After injury ended O'Neill's career, he entered management with non-league Grantham, Shepshed and Wycombe, whom he led into the Football League for the first time in 1993 and a further promotion the next year.

• He left Wycombe for Norwich in June 1995 but within six months had gone to Leicester, whom he would guide into the Premier League, winning the 1997 and 2000 League Cups to earn two UEFA Cup campaigns.

• O'Neill was appointed by Celtic in summer 2000 and in five years at the helm landed three league titles and three Scottish Cups, the Scottish League Cup completing a 2000/01 treble. He also led them to the 2003 UEFA Cup final.

• Managed Aston Villa between 2006 and 2010, then Sunderland from 2011 to March 2013. O'Neill was appointed Ireland manager, to be assisted by fellow former Forest player Roy Keane, that November, and led the team to UEFA EURO 2016 via a play-off win against Bosnia and Herzegovina. Agreed to stay on until the 2018 FIFA World Cup before the finals, where Ireland were eliminated by hosts France in the last 16.

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